The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2017
Filed:
Nov. 05, 2013
Hitachi High-technologies Corporation, Minato-ku, Tokyo, JP;
Yuko Otani, Tokyo, JE;
Taketo Ueno, Tokyo, JP;
Hideki Nakayama, Tokyo, JP;
Toshifumi Honda, Tokyo, JP;
Hitachi High-Technologies Corporation, Tokyo, JP;
Abstract
The present invention is suppressing the elongating phenomenon in the dark field image of defects in detecting a minute defect by using a dark field microscope. Provided is a method for detecting defects in which scattered light generated from the sample, is concentrated to form an image and is captured and processed to extract a defect to find the positional information of the defect, and the positional information is output, wherein an image of the scattered light that suppresses the occurrence of the elongating phenomenon is formed for which partial shielding of a component of the forward scattered light, that passes through a region near the outer edge of the field of view of the objective lens, and the positional information for the defect is found from a luminance signal for a defect that is extracted from a captured scattered light image that suppresses the occurrence of the elongating phenomenon.